* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

#app {
  height: 100vh;
  display: flex;
  justify-content: space-around;
  flex-direction: column;
  align-items: center;
}

.box {
  height: 200px;
  width: 400px;
  border: 3px solid #000;
}

.box:hover {
    cursor: pointer;
}

.happy {
  background-color: pink;
}

.sad {
  background-color: blue;
}

.normal {
  background-color: skyblue;
}

.box-radius {
    border-radius: 10px;
}

.text-scale {
    font-size: 20px;
}
